Year 6 Explore angles and Investigate Triangles...

What is proof?

Proof in mathematics means that a convincing demonstration has been carried out mathematically, using logical steps. Mathematical ideas are tested several times to see if they hold true in any situation, then a statement is made. The statement that is provided is often called a theorem.

In our case we are looking at the angles in a triangle. The theory is that the sum of the angles in a triangle equal 180°.

Some Year 6's decided to investigate and test the theory –

The enquiry questions were:

• Do all the angles of a triangle add up to 180 degrees no matter how you draw it? Can you write up your findings?
• Explain your methods (Say what and how you did it)
• How you arrived at your answers?
• Record your results as evidence to support your conclusions (What you found out)
• What conclusions can you draw from your results?

Here are useful links from the web to help you with your investigation report.  Click on Exploring angles within a triangle and also scroll down and follow the links for the interative games.  See below. (The video sounds a bit robotic! However it is interesting kids!)

Exploring Angles in a Triangle - Video

Exploring and Solving Triangles - Video

Shape Classification - Interactive learning game

Classifying Quadrilaterals - Video

So year 6   Did you take on the challenge and explore? What did you find out?  Let me know leave your comments...

Hey try out these Triangle Teasers. How many can you see?